Zawór zwrotny

Easy to fit, and allowed me to drain my dryer easily Would highly recommend

Seems well made and does exactly what it is designed for. Easy to fit. However, it does seem expensive for what it is. Surely this item could be included as standard with a Miele tumble dryer given the purchase price.

Part required if you want a permanent venting of the dryer into the trap of the sink. Did the job is was supposed to do!

A small, plastic but expensive item; usually made more robustly from brass. This item must be so cheap to make it should be included with the appliance. Its absence simply causes delay and frustration at the time of installation.